| (19) |
 |
|
(11) |
EP 0 363 995 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.10.1991 Bulletin 1991/42 |
| (43) |
Date of publication A2: |
|
18.04.1990 Bulletin 1990/16 |
| (22) |
Date of filing: 17.10.1989 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE FR GB IT LI NL SE |
| (30) |
Priority: |
18.10.1988 JP 263751/88
|
| (71) |
Applicant: IDEMITSU PETROCHEMICAL CO. LTD. |
|
Tokyo 100 (JP) |
|
| (72) |
Inventors: |
|
- Omori, Masao
Ichihara-shi
Chiba-ken (JP)
- Koyama, Yoshinari
Ichihara-shi
Chiba-ken (JP)
- Shirota, Daigo
Ichihara-shi
Chiba-ken (JP)
|
| (74) |
Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER |
|
Mauerkircherstrasse 45
81679 München
81679 München (DE) |
|
| |
|
| (54) |
Method for recovery of solvent used in production of polyarylene sulfide |
(57) The present invention provides a method for recovery of solvent used in production
of polyarylene sulfide according to which deterioration of the solvent is little and
recovery rate is high and which comprises subjecting a mixed liquid mainly composed
of solvent used in production of polyarylene sulfide and generated from production
process of polyarylene sulfide to flash evaporating operation to separate the mixed
liquid into flashed vapor (A) and flashed residue (B) and then rectifying the flashed
vapor (A).